Paul, I hope you understand that this section is about the Nature Conservation Management for Long Valley which is one of the projects that HKBWS currently running and has something to do with birds. HKBWS members and the public has the right to know any updates of the project (well, I can't bear the responsibility for not informing our members about that). The water chestnut pudding is a farm product that produced under this project.
Martin, yes, I think you can use this to bait bees, ants, cockroaches, rats and any animals that like sweet taste.